Project Eraser: Kill chrome://memory.

chrome/browser/resources/memory_internals/memory_internals.js

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-var g_main_view = null;
-
-/**
- * This class is the root view object of the page.
- */
-var MainView = (function() {
-  'use strict';
-
-  /**
-   * @constructor
-   */
-  function MainView() {
-    $('button-update').onclick = function() {
-      chrome.send('update');
-    };
-  };
-
-  MainView.prototype = {
-    /**
-     * Receiving notification to display memory snapshot.
-     * @param {Object}  Information about memory in JSON format.
-     */
-    onSetSnapshot: function(browser) {
-      $('json').textContent = JSON.stringify(browser);
-      $('json').style.display = 'block';
-
-      $('os-value').textContent = browser['os'] + ' (' +
-          browser['os_version'] + ')';
-      $('uptime-value').textContent =
-          secondsToHMS(Math.floor(browser['uptime'] / 1000));
-
-      this.updateSnapshot(browser['processes']);
-      this.updateExtensions(browser['extensions']);
-    },
-
-    /**
-     * Update process information table.
-     * @param {Object} processes information about memory.
-     */
-    updateSnapshot: function(processes) {
-      // Remove existing processes.
-      var size = $('snapshot-view').getElementsByClassName('process').length;
-      for (var i = 0; i < size; ++i) {
-        $('snapshot-view').deleteRow(-1);
-      }
-
-      var template = $('process-template').childNodes;
-      // Add processes.
-      for (var p in processes) {
-        var process = processes[p];
-
-        var row = $('snapshot-view').insertRow(-1);
-        // We skip |template[0]|, because it is a (invalid) Text object.
-        for (var i = 1; i < template.length; ++i) {
-          var value = '---';
-          switch (template[i].className) {
-          case 'process-id':
-            value = process['pid'];
-            break;
-          case 'process-info':
-            value = process['type'];
-            if (process['type'].match(/^Tab/) && 'history' in process) {
-              // Append each tab's history.
-              for (var j = 0; j < process['history'].length; ++j) {
-                value += '<dl><dt>History ' + j + ':' +
-                    JoinLinks(process['history'][j]) + '</dl>';
-              }
-            } else {
-              value += '<br>' + process['titles'].join('<br>');
-            }
-            break;
-          case 'process-memory-private':
-            value = process['memory_private'];
-            break;
-          case 'process-memory-v8':
-            if (process['v8_alloc'] !== undefined) {
-              value = process['v8_used'] + '<br>/ ' + process['v8_alloc'];
-            }
-            break;
-          }
-          var col = row.insertCell(-1);
-          col.innerHTML = value;
-          col.className = template[i].className;
-        }
-        row.setAttribute('class', 'process');
-      }
-    },
-
-    /**
-     * Update extension information table.
-     * @param {Object} extensions information about memory.
-     */
-    updateExtensions: function(extensions) {
-      // Remove existing information.
-      var size =
-          $('extension-view').getElementsByClassName('extension').length;
-      for (var i = 0; i < size; ++i) {
-        $('extension-view').deleteRow(-1);
-      }
-
-      var template = $('extension-template').childNodes;
-      for (var id in extensions) {
-        var extension = extensions[id];
-
-        var row = $('extension-view').insertRow(-1);
-        // We skip |template[0]|, because it is a (invalid) Text object.
-        for (var i = 1; i < template.length; ++i) {
-          var value = '---';
-          switch (template[i].className) {
-          case 'extension-id':
-            value = extension['pid'];
-            break;
-          case 'extension-info':
-            value = extension['titles'].join('<br>');
-            break;
-          case 'extension-memory':
-            value = extension['memory_private'];
-            break;
-          }
-          var col = row.insertCell(-1);
-          col.innerHTML = value;
-          col.className = template[i].className;
-        }
-        row.setAttribute('class', 'extension');
-      }
-    }
-  };
-
-  function JoinLinks(tab) {
-    var line = '';
-    for (var l in tab['history']) {
-      var history = tab['history'][l];
-      var title = (history['title'] == '') ? history['url'] : history['title'];
-      var url = '<a href="' + history['url'] + '">' + HTMLEscape(title) +
-          '</a> (' + secondsToHMS(history['time']) + ' ago)';
-      if (l == tab['index']) {
-        url = '<strong>' + url + '</strong>';
-      }
-      line += '<dd>' + url;
-    }
-    return line;
-  };
-
-  /**
-   * Produces a readable string int the format '<HH> hours <MM> min. <SS> sec.'
-   * representing the amount of time provided as the number of seconds.
-   * @param {number} totalSeconds The total amount of seconds.
-   * @return {string} The formatted HH hours/hours MM min. SS sec. string
-   */
-  function secondsToHMS(totalSeconds) {
-    totalSeconds = Number(totalSeconds);
-    var hour = Math.floor(totalSeconds / 3600);
-    var min = Math.floor(totalSeconds % 3600 / 60);
-    var sec = Math.floor(totalSeconds % 60);
-    return (hour > 0 ? (hour + (hour > 1 ? ' hours ' : ' hour ')) : '') +
-           (min > 0 ? (min + ' min. ') : '') +
-           (sec + ' sec. ');
-  }
-
-  return MainView;
-})();
-
-/**
- * Initialize everything once we have access to chrome://memory-internals.
- */
-document.addEventListener('DOMContentLoaded', function() {
-  g_main_view = new MainView();
-});